Shortage of liberties
This is the idea that has to be exploited (double damezumari).
It seems that White is alive
But this seems to kill
So let's try to get an eye in the corner first.
Trying to get an eye in the corner
It seems that in this diagram gives White an eye. If Black does not defend at then there will be a second eye.
Sub-pages (up)Solution
Referenced byKanazawaProblem38